William f



(No Model.)

W. F. TROAST.

PADLOCK.

No. 496,921. .Patented May 9, 1893.

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UNITED STATES PATENT OFFICE..

WILLIAM F. TROAST, OF LANCASTER, PENNSYLVANIA, ASSIGNOR TO HIM- SELF,SAMUEL R. SLAYMAKER, AND JOI-IN F. BARRY, OF SAME PLACE.

PAD LOC K.

SPECIFICATION forming part of Letters Patent No. 496,921, dated May 9,1893.

Application filed August 9, 1892. Serial No. 442,593. (Nomodel.)

v and useful Improvements in Locks, of which the following is aspecification.

My invention is applicable in whole or in part to various types oflocks; and it relates more particularly to that class known as padlocksprovided with a notched shackle and means for automatically throwing theshackle out when the shot-bolt is shifted into open position, and withdevices for automatically locking the shackle when the same is insertedinto the housing of thelock.

The principal objects ot' my invention are irst, to provide a safe,efficient, compact, durable and comparatively inexpensive padlock;second, to reduce the number and simplify the construction of theworking parts of such a lock; and third, to construct and arrange theshot-bolt and its complemental spring for operation in such manner thatthe shot-bolt is normally locked in open and closed positions, and hencecannot be moved by jarring or picking, but is adapted to be lifted andshifted into open position by the key and to be oscillated and releasedby the shackle and permitted to return to its closed and locked positionunder the inliuence of the spring.

My invention consists of a lock provided with a locking-post, ashot-bolt having a iinger or projection, a cheek and an ear, a springtending to cause the finger to engage the post, and a key adapted toengage the cheek, overcome the spring and release the linger orprojection, and to engage the ear and shift the bolt into open position.

My invention further consists of a lock provided with a bolt-guide,alocking-post, a shotbolt having a finger or projection and a hookshapedlip, a spring tending to force the bolt into engagement with the postand into closed position, a shackle for engaging the lip and pivotingthe bolt on the bolt-guide and releasing the linger or projection topermit the bolt to move under the influence-of the spring intoengagement with the shackle.

My invention further consists of a lock pro- `same provided with akey-hole.

vided with a locking-post, a bolt-guide, a slotted shackle, a shot-bolthaving a finger or projection, a cheek, an ear and a lip, a springhaving one extremity in engagement with an inclined face on the bolt andtending to shift the latter into engagement with the post and intoclosed position, and having the other eX- tremity in range of theshackle; and my invention further consists of the improvements in locks,hereinafter described and claimed.

The nature, scope and general characteristic features of my inventionwill be more fully understood from the following description taken inlconnection with the accompanying drawings forming part hereof; and inwhich- Figure 1, is a front elevation of a padlock showing the shot-boltin closed position in engagement with the notched shackle and alsoshowing the coverplate removed in order to expose to View the internalmechanism embodying features of my invention. Fig. 2, isa similar viewof the cover-plate showing the Fig. 3, is a View similar to Fig. 1,showing the shot-bolt in open position and the free or slotted eX-tremity of the shackle thrown out of the housing of the lock. Fig. 4, isadetail view drawn to an enlarged scale and taken from the front of thelock in order to illustrate the manner in which the key engages a cheekon the shot-y bolt and lifts a linger or projection on the lat-` ter outof range of the locking-post. Fig. 5, is a view similar to Fig. 4, buttaken from the back of the lockv in order to illustrate theman# ner inwhich the key engages an ear on the shot-bolt and eects the shifting ofthe latter into open position. Fig. 6, is a view similar to Fig. 4,showing the manner in which the shackle engages a lip on the shot-bolt,and turns the latter into position for releasing the finger from thelocking-post in order to permit the shot-bolt to move under theinfluenceof a spring forward and downward into closed position in engagement withthe shackle as shown in Fig. l. Fig. 7, is a plan view of the undersideof the shot-bolt showing the cheek and ear with which the key engages;and Fig. 8, is an elevationv of a skeleton key adapted to actuate theshot-bolt.

In the drawings a, is a case or housing provided with a bolt-guide a', alocking-post a2,

IOO

a spring retaining pin d3, a key-seat d4, and an opening a5, forpurposes to be presently fully described.

b, is a cover-plate adapted to be secured to the case or housing d, bymeans of screws b', and provided with a key-hole b2. In the presentinstance thekey-hole b2, is of the form of asquare, one of whose sidescommunicates with an oblong slot. However, other forms of key-holes maybe employed.

c, is a shackle having one extremity c', thereof pivotally connectedwith the housing a, and having the free extremity c2, thereof providedwith a notch or slot c3, and adapted to enter the opening d5, of thehousing a.

d, is a shot-bolt adapted to engage the notch cof the shackle andprovided with a finger or projection d', a cheek d2, an ear d3, ahookshaped lip d4, and a recess d5.

s, is a spiral spring mounted upon the pin d3, and having one extremitythereof in engagement with an inclined and curved face d, cut orotherwise formed upon the shot-bolt d, and having the other extremitys2, thereof adapted to work in the recess d5, and extended into range ofthe free end c2, of the shackle.

j', is a skeleton key adapted to register with the key-hole b2, andprovided with circular portions f and f2, whereof one is adapted to turnin the key-seat a4, and the other in the upper square portion of thekey-hole. This key f,is also provided with projections f3 and f5,adapted respectively to engage the cheek d2, and ear d3, of theshot-bolt d. Of course the key f, may be provided with wards of anypreferred construction. However, in the present instance the wards arenot shown.

The mode of operation of the hereinabove described lock, is as followsz-When the shotbolt d, is in closed position (Fig. l) or in openposition (Fig. 3), the finger or projection d engages the locking-postd2, and the extremity s', of the spiral spring s, by engaging the curvedand inclined face d, of the shot-bolt d, tends to maintain the finger orprojection d', in engagement with the locking-post a2, so that theshot-bolt d, is automatically locked in closed and in open positions.This result is important, because it prevents the lock from beingopenedby jarringand picking, and also prevents the shot-bolt from beingaccidentally shifted into closed position, when the shackle c, has beenwithdrawn from the housing d. For the sake of a further description ofthe invention it will be assumed that the shot-bolt d, is in closedposition in engagement with the notch c3, of the shackle c, as shown inFig. l, and that it is necessary or desirable to release the shackle c,and shift the shot-bolt d, into open position as shown in Fig. 3. Theseresults are accomplished in the following manner:-The key f, is insertedinto the key-hole b2, and turned in the direction indicated by thearrows in Figs. 4t and 5, so that the projection f3, of the key f,engages the cheek d2, and thus overcoming the force of the extremity s',of the spring s, lifts the shot-bolt d, upward and consequently releasesit by causing the finger or projection d', to clear the locking-post d2,as shown in Fig. 4. The subsequent turning of the keyf, causes theprojection f4, thereof to engage the ear d3, of the shot-bolt d, and tothus bring the same into the position shown in Fig. 5, with the resultthat the extremity c2, of the shackle is released and then thrown out ofthe housing a, by the extremity s2, of the spiral spring s. Thecontinued turning of the key f, causes the proj ection f4, to pass outof range of the ear cl3, whereupon the extremity s', of the spring s,forces the shot-bolt d, downward into open positionwith the finger orprojection CZ', behind the locking-post a2, as shown in Fig. 3. Theshot-bolt d, may be returned to closed position as shown in Fig. 3, byforcing the portion c2, of the shackle c, into the opening a5. Duringthis operation the extremity of the shackle c, contacts with thehook-shaped end of the lip d4, and thus turns the shot-bolt d, about thebolt-guide a', as shown in Fig. 6, into position for permitting thefinger or projection d', to clear the locking-post d2, whereupon theextremity s', of the spiral spring s, acting upon the curved andinclined face d, forces the shot-bolt d, forward as indicated by thearrows in said figure and downward into closed position as shown in Fig.1, in engagement with the shackle and with the nger or projection d', infront of the locking-post a2.

From the foregoing description it appears that the function of thespiral spring s, is three-fold: first, it serves to throw the shackle c,out of the lock; second, to force the shotbolt d, downward; and third,it tends to shift the shot-bolt d, forward. This is important because itresults in causing a single spring to perform the combined functions ofthree separate springs and consequently is conducive to economy of laborand space.

Having thus described the nature and objects of my invention, what Iclaim as new, and desire to secure by Letters Patent, is-

1. A lock provided with a bolt-guide, a locking-post, a shot-bolt havinga nger or projection and a hook-shaped lip, a spring tending to forcethe finger or projection into engagement with the post and to force theshot-bolt into closed position, a shackle for engaging the lip andturning the bolt on the bolt-guide to release the finger or projectionand to permit the bolt to move Linder the infiuence of the spring intoengagement with a slot in the shackle, substantially as and for thepurposes set forth.

2. In a lock, a locking post, a bolt-guide, a shot-bolt provided with afinger or projection, a cheek and an ear, a spring and a key,substantially as and for the purposes set forth.

3. A lock provided with a locking-post, a bolt-guid e, aslotted-shackle, a shot-bolt provided with a finger or projection, acheek, an ear and a lip, a spring having one extremity in engagementwith an inclined face on the IOO bolt and tending to shift the latterinto engagement with the post and into closed position, and having theother extremity in range of the shackle, and a key for engaging thecheek and ear, substantially as and for the purposes set forth.

4. In a lock, a shackle, a locking-post, a shot-bolt having a linger orprojection and a cheek and an ear and an inclined face and a springhaving one extremity in range of the shackle and the other extremity inengagement with the curved face and tending to v shift the shot-boltforward and downward and a key substantially as and for the purposes setforth.

5.- In a lock, a shot-bolt provided with a projection, a cheek and anear, means substantially as described for normally retaining thesl1otbolt in closed position, and a key having a projection for engagingthe cheek and releasing the bolt and a projection for engaging the earand shifting the bolt, substantially as and for the purposes set forth.

In testimony whereof I have hereunto set my signature in the presence oftwo subscribing witnesses.

WILLIAM F. TROAST. Witnesses:

CHARLES F. HAGA, Jr., JNO. N. HETRICK.

